Spin je osnovna osobina elementarne čestice, poput mase i naelektrisanja. Pošto je kvantno-mehaničke prirode ne može se opisati makroskopski. Najpribližnije se može shvatiti kao mehanički moment, tj, kao da se čestica ponaša kao mala čigra.
Za ostala značenja, vidi Spin (razvrstavanje).
Spin ima dimenzije dejstva, a izražava se kao umnožak Plankove konstante i spinskog kvantnog broja.
Pored elementarnih čestica spin mogu posedovati i njihove kombinacije, recimo, atomska jezgra pa se onda govori o nuklearnom spinu. Nuklearni spin je kombinacija spinova protona i neutrona od kojih je jezgro načinjeno.
Isto tako, orbite elektrona u atomima i molekulima mogu imati spin.
Čestice sa celobrojnim spinskim kvantnim brojem su bozoni, a sa polucelim fermioni.
- S. Macura, J. Radić-Perić, ATOMISTIKA, Službeni list, Beograd, 2004. str. 144.
- Cohen-Tannoudji, Claude; Diu, Bernard; Laloë, Franck (2006). Quantum Mechanics (2 volume set izd.). John Wiley & Sons. ISBN 978-0-471-56952-7.
- Condon, E. U.; Shortley, G. H. (1935). „Especially Chapter 3”. The Theory of Atomic Spectra. Cambridge University Press. ISBN 0-521-09209-4.
- Hipple, J. A.; Sommer, H.; Thomas, H.A. (1949). A precise method of determining the faraday by magnetic resonance. DOI:10.1103/PhysRev.76.1877.2.https://www.academia.edu/6483539/John_A._Hipple_1911-1985_technology_as_knowledge
- Edmonds, A. R. (1957). Angular Momentum in Quantum Mechanics. Princeton University Press. ISBN 0-691-07912-9.
- Jackson, John David (1998). Classical Electrodynamics (3rd izd.). John Wiley & Sons. ISBN 978-0-471-30932-1.
- Serway, Raymond A.; Jewett, John W. (2004). Physics for Scientists and Engineers (6th izd.). Brooks/Cole. ISBN 0-534-40842-7.
- Thompson, William J. (1994). Angular Momentum: An Illustrated Guide to Rotational Symmetries for Physical Systems. Wiley. ISBN 0-471-55264-X.
- Tipler, Paul (2004). Physics for Scientists and Engineers: Mechanics, Oscillations and Waves, Thermodynamics (5th izd.). W. H. Freeman. ISBN 0-7167-0809-4.
- Sin-Itiro Tomonaga, The Story of Spin, 1997
- "Spintronics. Feature Article" in Scientific American, June 2002.
- Goudsmit on the discovery of electron spin.
- Nature: "Milestones in 'spin' since 1896."
- ECE 495N Lecture 36: Spin Online lecture by S. Datta
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